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BIGRAMATIC :
Involving, or made on the basis of, pairs of adjacent letters, figures,
or other units.
BITE :
Continuous series of blacked-out squares on any margin of a "pattern"
used in transposition.
BLIST, n :
(short for Banister list). A register of Enigma messages showing
especially indicators, call signs, intercepting station serial
numbers, length of message, and time of origin, designed to facilitate
detection of cillies, psillies, etc., and identification of crib
messages.
BLIST, v :
To record particulars of on a Blist.
BLOCK :
A section of a book of trigram discriminants assigned to a particular
Enigma key for a month, or to a group of such keys for a particular
day; in which latter case the block is shared by the users in a
regular (and hence predictable) manner.
BLOCK-SHARERS METHOD :
A method of identifying Enigma keys from a knowledge of how a block
of discriminants is shared by the various users in a group.
BLOG, n :
A dummy code-group, especially one used as "padding" at the beginning
or end of a message.
BLOG, v :
To insert blogs in encoded messages.
BLOGGER :
An encoder or encipherer who habitually uses blogs.
BOG WHEEL ORDER :
A wheel order considered unlikely to be used owing to its having been
used on the key concerned fairly recently.
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